Add force walk for players and NPCs

[ZeerohDev]

Add the ability to force walk through clipped areas (useful for things like agility).

[Tomm0017]

Addressed in 6918a34 & 6918a34

However, there is a caveat; there are specific situations where no-clipping will result in weird steps being taken until you teleport to your destination. I believe this is because the client will try to predict certain movement, though I do have to debug further to see if this is the case.